Playing an instrument isn’t easy to begin with, but these instruments will really test your patience! Welcome to WatchMojo.com. Today we’ll be taking a look at our picks for the top 10 Hardest Instruments to Learn. From Harp, Guitar, Piano, Accordion and Drums to Oboe, Violin, French Horn, theremin and bagpipes, these instruments are all incredible musical tools – but only if you know how to use them! Did your favorite instrument appear in this list? Let us know in the comments.